Features 1121
Tone #
Frequency
(Hz)
dB below
overload
Precision
Ringing
Tones
DTMF
Digits MF Digits
83* reserved
84
350/440 -17/-17
÷
85
400/450 -17/-17
÷
86 400 -17
÷
87 1400 -26
÷
88 950 -12
÷
89 1400 -12
÷
90 1800 -12
÷
91 470 0
÷
92 940 0
÷
93 1300 0
÷
94 1500 0
÷
95 1880 0
÷
96
350/440 -10/-10
97* TBD
98* TBD
99* TBD
100* TBD
101 600 -19
÷
102 800 -19
÷
103 1400 -23
÷
104 820
-7
Note: Tones #1 - 16 (inclusive) and #234 - 249 (inclusive) are included
for Norwegian and Malaysian specifications.
Tones marked with * are not supported by IP sets and therefore should
not be selected in any system that has IP sets.
Table 458
NTAK03, NTDK20, and NTDK97 A-Law tones and cadences
Tone # Frequency (Hz)
dB below
overload
Precision
Ringing
Tones
DTMF
Digits MF Digits
1
940 X 1630 -14/-13 P
2
700 X 1210 -14/-13
1
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.